Gold Standard Assessment

Measure Your Attentional Alertness

The Psychomotor Vigilance Task (PVT-B) is the scientific gold standard utilized by sleep research laboratories and aerospace industries to measure sustained attention, fatigue levels, and cognitive deficits resulting from sleep deprivation.

Task Instructions:

1

A red target box will appear on screen. Wait silently. Do not anticipate or click early.
2

As soon as a millisecond counter flashes inside the box, press the SPACEBAR or CLICK/TAP the screen as fast as possible.
3

Your reaction time (RT) will display. Reaction speeds slower than 500ms represent **lapses of attention** (micro-sleeps).

Laboratory Settings

Configure the vigilance testing parameters before launching.

Session Duration

3-min standard is optimal for identifying moderate sleep pressure.

Trigger Interface

Spacebar triggers ensure the absolute lowest hardware latency.

Auditory Feedback

Generates Web Audio chimes for successes, lapses, and false starts.

Vigilance Grade

Optimal Alertness Profile

Your reaction speeds are consistent with high executive function, optimal rest, and absence of significant sleep debt.

235 Mean ms

0 Total Lapses

Mean Reaction Time 0 ms Optimal (< 250ms)

Attentional Lapses 0 No lapses observed

False Starts 0 Optimal anticipation

Reciprocal RT (1/RT) 0.00 Vigilance speed index (s⁻¹)

Vigilance Performance Score 100.0 % Sustained attentional accuracy

Attention Vigilance Timeline

Reaction time per trial chronological sequence

Clinical Diagnostics & Fatigue Assessment

Diagnostic loading...

O2 SleepWell Laboratory History

Date & Time	Duration	Mean RT	Lapses	False Starts	Score